<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>简单选择器示例</title>
    <style type="text/css">
        p {
            color: red;
            font-size: 32px;
        }
        #xiyouji, #shuihuzhuan, .sanguoyanyi, .hongloumeng {
            color: #ffffff;
        }
        #xiyouji {
            background-color: #669900;
        }
        #shuihuzhuan {
            background-color: aqua;
        }
        .sanguoyanyi {
            background-color: rgba(100, 255, 0, 0.6);
        }
        .hongloumeng {
            background-color: #FF8866;
        }
    </style>
</head>
<body>
    <p>四大名著</p>
    <div id="xiyouji">西游记</div>
    <div id="shuihuzhuan">水浒传</div>
    <div class="sanguoyanyi">三国演义</div>
    <div class="hongloumeng">红楼梦</div>
</body>
</html>